Septic System Installation — Find Verified Companies Near You
Professional installation of a new septic system including site evaluation, permitting, excavation, tank placement, and drain field construction.
Installing a new septic system is a major project that requires professional expertise, proper permits, and careful site planning. Building a new home? Replacing a failed system? Either way, choosing the right installer is critical to the longevity and performance of your septic system.
The Installation Process
- Site evaluation and soil testing: A percolation (perc) test determines if your soil can properly filter wastewater. This determines the type and size of system you need.
- System design: An engineer designs the system layout, including tank size, drain field dimensions, and placement.
- Permitting: Your installer obtains the necessary permits from your local health department.
- Excavation and installation: The crew excavates the site, installs the tank, lays drain field piping, and connects everything to your home's plumbing.
- Inspection and backfill: A local inspector verifies the installation meets code before the system is covered and backfilled.
Cost Factors
Installation costs range from $10,000 to $25,000+ depending on the system type (conventional, mound, aerobic), soil conditions, lot size, and local labor rates. Advanced systems like aerobic treatment units or mound systems cost more due to additional engineering and materials.
Septic System Installation Companies by State
Browse 1,204 septic system installation companies across 48 states.
| State | Companies | Avg Rating |
|---|---|---|
| Texas | 135 | 4.6 ★ |
| Florida | 103 | 4.5 ★ |
| North Carolina | 71 | 4.7 ★ |
| Georgia | 68 | 4.7 ★ |
| New York | 60 | 4.7 ★ |
| Washington | 57 | 4.6 ★ |
| Michigan | 52 | 4.7 ★ |
| Pennsylvania | 41 | 4.6 ★ |
| Illinois | 38 | 4.7 ★ |
| California | 36 | 4.5 ★ |
| Connecticut | 32 | 4.8 ★ |
| Wisconsin | 31 | 4.5 ★ |
| Massachusetts | 30 | 4.6 ★ |
| New Jersey | 29 | 4.6 ★ |
| Minnesota | 28 | 4.8 ★ |
| Ohio | 27 | 4.7 ★ |
| Indiana | 26 | 4.7 ★ |
| Maryland | 26 | 4.7 ★ |
| Oklahoma | 25 | 4.8 ★ |
| Alabama | 22 | 4.6 ★ |
| Missouri | 22 | 4.8 ★ |
| Tennessee | 21 | 4.7 ★ |
| Oregon | 20 | 4.7 ★ |
| South Carolina | 19 | 4.6 ★ |
| Arizona | 18 | 4.7 ★ |
| New Hampshire | 17 | 4.8 ★ |
| Virginia | 17 | 4.5 ★ |
| Colorado | 16 | 4.7 ★ |
| New Mexico | 12 | 4.6 ★ |
| Louisiana | 10 | 4.5 ★ |
| Vermont | 9 | 4.7 ★ |
| Kansas | 9 | 4.7 ★ |
| Iowa | 8 | 4.8 ★ |
| Maine | 8 | 4.8 ★ |
| Nebraska | 8 | 4.7 ★ |
| Idaho | 7 | 4.9 ★ |
| Kentucky | 7 | 4.6 ★ |
| Montana | 7 | 4.8 ★ |
| Mississippi | 6 | 4.7 ★ |
| Alaska | 5 | 4.7 ★ |
| Utah | 5 | 4.8 ★ |
| Arkansas | 4 | 4.7 ★ |
| Rhode Island | 3 | 4.7 ★ |
| West Virginia | 3 | 4.9 ★ |
| Hawaii | 2 | 5.0 ★ |
| Delaware | 2 | 4.8 ★ |
| Wyoming | 1 | 4.9 ★ |
| North Dakota | 1 | 5.0 ★ |
Frequently Asked Questions About Septic System Installation
How much does a new septic system cost?
A new septic system typically costs $10,000 to $25,000, depending on the system type, soil conditions, and local requirements. Advanced systems can cost more.
How long does septic installation take?
Installation usually takes 2 to 5 days for excavation and construction, but the entire process from permitting to completion can take several weeks.
Do I need a perc test for septic installation?
Yes, a percolation test is required in most areas to determine if your soil can properly absorb and filter wastewater. The results determine what type of system can be installed.
What type of septic system do I need?
The type depends on your soil, lot size, and local codes. Conventional gravity systems work on most properties with decent soil drainage. Mound systems are used when the water table is high. Aerobic treatment units work on smaller lots or poor soils. Your installer and local health department will determine the right fit.
Do I need a permit to install a septic system?
Yes. Every state requires a permit for septic installation. Your installer typically handles the permit application, which involves submitting the system design, soil test results, and site plan to your local health department. Installation without a permit can result in fines and forced removal.
How long does a septic system last?
A well-maintained conventional septic system lasts 25 to 30 years. Concrete tanks can last 40+ years. The drain field is usually the first component to need replacement, typically after 15 to 25 years depending on soil conditions and maintenance.
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